Barack Obama is the first president of the United States to visit Hiroshima Peace Memorial Park and meet Hibakusha.

Barack Hussein Obama II is an American politician who was the 44th president of the United States from 2009 to 2017. A member of the Democratic Party, he was the first African American president. Obama previously served as a U.S. senator representing Illinois from 2005 to 2008 and as an Illinois state senator from 1997 to 2004.

Hiroshima Peace Memorial Park is a memorial park in the center of Hiroshima, Japan. It is dedicated to the legacy of Hiroshima as the first city in the world to suffer a nuclear attack at the end of World War II, and to the memories of the bomb's direct and indirect victims. The Hiroshima Peace Memorial Park is visited by more than one million people each year. The park is there in memory of the victims of the nuclear attack on August 6, 1945, in which the United States dropped an atomic bomb on the Japanese city of Hiroshima. The Hiroshima Peace Memorial Park was planned and designed by the Japanese Architect Kenzō Tange at Tange Lab.

Hibakusha is a word of Japanese origin generally designating the people affected by the atomic bombings of Hiroshima and Nagasaki by the United States at the end of World War II.